The Crown is Kether, the serpent the pathway up the Tree (as opposed to the lightening bolt the pathway down)
Or the Crown is the top chakra and the Serpent the Kundalini.
The serpent also is a symbol of change (it sheds it skin to be 'reborn' anew), when the serpent is crowned, the change has been invoked by superconciousness- an act of magical will.
The 2 discs are duality, positive or negative current, the snake is the electrical charge - or the Duality is Yin Yang, the snake Tao etc.
I think the point is that the 2 D. represents not haphazard change but change either invoked or realised on a higher plane. Also that, although duality is percieved, it is not the reality, hence (on this plane) one seemingly different thing can become it's 'opposite' and visa versa, back and forwards as their is really no difference between any one thing and another. - That's easier to comprehend when one wears (read - is able to wear) the magical crown.
Also for snakes meditate well on the Rite of Jupiter:
O coiled and constricted and chosen!
O tortured and twisted and twined!
Deep spring of my soul deep frozen,
The sleep of the truth of the mind!
As a bright snake curled
Round the Vine of the World!
O sleeper through dawn and through daylight,
O sleeper through dusk and through night!
O shifted from white light to gray light,
From gray to the one black light!
O silence and sound
In the far profound!
O serpent of scales as an armour
To bind on the breast of a lord!
Not deaf to the Voice of the Charmer,
Not blind to the sweep of the sword!
I strike to the deep
That thou stir in thy sleep!
Rise up from mine innermost being!
Lift up the gemmed head to the heart!
Lift up till the eyes that were seeing
Be blind, and their life depart!
Till the Eye that was blind
Be a lamp to my mind!
Coil fast all thy coils on me, dying,
Absorbed in the sense of the Snake!
Stir! leave the flower-throne, and up-flying!
Hiss once, and hiss thrice, and awake!
Then crown me and cling!
Flash forward-and spring!
Flash forth on the fire of the altar,
The stones, and the sacrifice shed;
Till the Three Worlds flicker and falter,
And life and her love be dead!
In mysterious joy
Awake-and destroy!
AND
Lift up this love of peace and bliss,
The starry soul of wine,
Destruction's formidable kiss,
The lamp of the divine:
This shadow of a nobler name
Whose life is strife, whose soul is fame!
I rather will exalt the soul
Of man to loftier height,
And kindle at a livelier coal
The subtler soul of light.
From these soft splendours of a dream
I turn, and seek the Self supreme.
This world is shadow-shapen of
The bitterness of pain.
Vain are the little lamps of love!
The light of life is vain!
Life, death, joy, sorrow, age and youth
Are phantoms of a further truth.
Beyond the splendour of the world,
False glittering of the gold,
A Serpent is in slumber curled
In wisdom's sacred cold.
Life is the flaming of that flame.
Death is the naming of that name,
The forehead of the snake is bright
With one immortal star,
Lighting her coils with living light
To where the nenuphar
Sleeps for her couch. All darkness dreams
The thing that is not, only seems.
That star upon the serpent's head
Is called the soul of man.
That light in shadows subtly shed
The glamour of life's plan.
The sea whereon that lotus grows
Is thought's abyss of tears and woes.
Leave Sirenusa! Even Greece
Forget! they are not there!
By worship cometh not the Peace,
The Silence not by prayer.
Leave the illusions, life and time
And Death, and seek that star sublime,
Until the lotus and the sea
And snake no longer are,
And single through Eternity
Exists alone the Star,
And utter Knowledge rise, and cease
In that which is beyond the Peace!
